The Wikipedia article consulted gives only scattered national and regional breeding-pair counts (for example Poland, Romania, Hungary, Bulgaria); a secondary web search found a BirdLife-attributed figure of roughly 700,000 individuals worldwide, but the BirdLife DataZone factsheet page itself is JavaScript-rendered and no raw verbatim figure could be fetched from it this pass.
What would resolve this A verbatim global population figure fetched directly from the BirdLife DataZone factsheet, the European Red List of Birds PDF, or an equivalent named source this atlas can cite with a real locator and quote.
OpenOrnithologyWhite Stork (Wikipedia)